This 5.56 chambered 10-1/2 inch Government Profile Modern series barrel is machined from 4150 Chrome Moly Vanadium steel with a QPQ corrosion resistant finish and QPQ coated M4 feed ramp extension.

Series/Collection: Modern Series
Size: 5.56x45mm NATO
Barrel Length: 10-1/2"
Twist Rate: 1:7"
Thread Size: 1/2-28
Material: 4150 Chrome Molybdenum Vanadium Steel